Add 10/18 and 75/21
1st number: 10/18, 2nd number: 3 12/21
10/18 + 75/21 is 260/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
10/18 = 10 × 7/18 × 7 = 70/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
75/21 = 75 × 6/21 × 6 = 450/126 - Add the two like fractions:
70/126 + 450/126 = 70 + 450/126 = 520/126 - 520/126 simplified gives 260/63
- So, 10/18 + 75/21 = 260/63
In mixed form: 48/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/18+75/21 10/36+75/21 10/18+75/42 30/18+75/21 10/54+75/21 10/18+75/63 50/18+75/21 10/90+75/21 70/18+75/21